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<h2 class="title" style="clear: both"><a id="dbset_re_len"></a>Db::set_re_len()</h2>
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<pre class="programlisting">#include <db_cxx.h>
int
Db::set_re_len(u_int32_t re_len); </pre>
<p>
For the Queue access method, specify that the records are of length
<span class="bold"><strong>re_len</strong></span>. For the Queue access method,
the record length must be enough smaller than the database's page size
that at least one record plus the database page's metadata information
can fit on each database page.
</p>
<p>
For the Recno access method, specify that the records are
fixed-length, not byte-delimited, and are of length <span class="bold"><strong>re_len</strong></span>.
</p>
<p>
Any records added to the database that are less than <span class="bold"><strong>re_len</strong></span> bytes long are automatically padded (see
<a class="xref" href="dbset_re_pad.html" title="Db::set_re_pad()">Db::set_re_pad()</a> for
more information).
</p>
<p>
Any attempt to insert records into the database that are greater than
<span class="bold"><strong>re_len</strong></span> bytes long will cause the call
to fail immediately and return an error.
</p>
<p>
The <code class="methodname">Db::set_re_len()</code> method configures a database, not only
operations performed using the specified
<a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handle.
</p>
<p>
The <code class="methodname">Db::set_re_len()</code> method may not be called after the
<a class="xref" href="dbopen.html" title="Db::open()">Db::open()</a> method is called. If
the database already exists when
<a class="xref" href="dbopen.html" title="Db::open()">Db::open()</a> is called, the
information specified to <code class="methodname">Db::set_re_len()</code> will be ignored.
</p>
<p>
The <code class="methodname">Db::set_re_len()</code> <span>
<span>
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</span>
</span>
</p>
<div class="sect2" lang="en" xml:lang="en">
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<h3 class="title"><a id="idp5821512"></a>Parameters</h3>
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<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp5821896"></a>re_len</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>re_len</strong></span> parameter is the length of
a Queue or Recno database record, in bytes.
</p>
</div>
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<div class="sect2" lang="en" xml:lang="en">
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<h3 class="title"><a id="idp5814416"></a>Errors</h3>
</div>
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<p>
The <code class="methodname">Db::set_re_len()</code> <span>
<span>
method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
exception, encapsulating one of the following non-zero errors, or return one
of the following non-zero errors:
</span>
</span>
</p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
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<h4 class="title"><a id="idp5830384"></a>EINVAL</h4>
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<p>
If the method was called after <a class="xref" href="dbopen.html" title="Db::open()">Db::open()</a>
was called; or if an invalid flag value or parameter was specified.
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<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
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<h3 class="title"><a id="idp5831712"></a>Class</h3>
</div>
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<a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a>
</p>
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<h3 class="title"><a id="idp5821208"></a>See Also</h3>
</div>
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<a class="xref" href="db.html#dblist" title="Database and Related Methods">Database and Related Methods</a>
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